If you have decided that you need to work on your landscape design in several steps, because of budgetary or other restraints, it is still a good idea to work with a landscape designer on the initial design. This will give you a blueprint to work from as you begin each phase of the project.
When beginning to consider hiring a landscape designer, remember that spring is their busiest season. It is a good idea to begin talking to landscape designers in the fall of the year. This way, your plans will be ready to implement when spring arrives.